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Which would have better IQ?

Started 1 month ago | Discussions thread
KevinRA Senior Member • Posts: 1,457
Re: Which would have better IQ?

Johnrr44 wrote:

I'm cnsidering one or the other of these: Buy a R7 to go with my RF 100-500 + 1.4X (keeping my R5 for other uses) OR buy a 2.0X to go with my R5 and 100-500.

Big difference in cost. Is there a big difference in IQ? Some of my animal photography is very focal length limited.

(I still have a M50 for casual/travel/family photography, so I don't need a backup cam.)

Which would you do and why?

John

https://www.the-digital-picture.com/News/News-Post.aspx?News=37290&Title=Lets-Talk-About-Reach-Does-an-APS-C-Format-Imaging-Sensor-Increase-Reach

OK this is 1.4X vs none - but 1.4 vs 2 should be similar in resolution argument...

"The R7 image appears to have very slightly better resolution, and the R5 result's details are slightly larger, though I doubt these slight differences will be noticed in real-world images. The R5 image has more pixels and a modestly wider angle of view, but the R5 + 1.4x and the R7 have about the same reach. A conclusion from this discussion is that the Canon EOS R7 (or another high-density APS-C format camera) is a viable alternative to a 1.4x extender on a full-frame model when significant cropping (APS-C angle of view or smaller) will be required."

I own the R5 and R7 - not had the latter for long though. What I think makes much more of a difference is autofocus speed and accuracy.

IQ should be essentially the same. Ignore the crop factor - look at pixels per duck. Bigger pixels are better pixels with same framing, but with 2X vs 1.4x extender 1stop penalty so cancelling out. (Of course Olympus fanb0ys will tell you their 300 f/4 is magically a 600 f/4 in every respect).

 KevinRA's gear list:KevinRA's gear list
Canon EOS M6 II Canon EOS R5 Canon EOS R7 Canon EOS R10 Canon EF-S 60mm f/2.8 Macro USM +14 more
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